67 * serialVersionUID of the class. The ObjectStreamClass for a specific class
68 * loaded in this Java VM can be found/created using the lookup method.
69 *
70 * <p>The algorithm to compute the SerialVersionUID is described in
71 * <a href="{@docRoot}/../specs/serialization/class.html#stream-unique-identifiers">
72 * Object Serialization Specification, Section 4.6, Stream Unique Identifiers</a>.
73 *
74 * @author Mike Warres
75 * @author Roger Riggs
76 * @see ObjectStreamField
77 * @see <a href="{@docRoot}/../specs/serialization/class.html">
78 * Object Serialization Specification, Section 4, Class Descriptors</a>
79 * @since 1.1
80 */
81 public class ObjectStreamClass implements Serializable {
82
83 /** serialPersistentFields value indicating no serializable fields */
84 public static final ObjectStreamField[] NO_FIELDS =
85 new ObjectStreamField[0];
86
87 private static final long serialVersionUID = -6120832682080437368L;
88 private static final ObjectStreamField[] serialPersistentFields =
89 NO_FIELDS;
90
91 /** reflection factory for obtaining serialization constructors */
92 private static final ReflectionFactory reflFactory =
93 AccessController.doPrivileged(
94 new ReflectionFactory.GetReflectionFactoryAction());
95
96 private static class Caches {
97 /** cache mapping local classes -> descriptors */
98 static final ConcurrentMap<WeakClassKey,Reference<?>> localDescs =
99 new ConcurrentHashMap<>();
100
101 /** cache mapping field group/local desc pairs -> field reflectors */
102 static final ConcurrentMap<FieldReflectorKey,Reference<?>> reflectors =
103 new ConcurrentHashMap<>();
104
105 /** queue for WeakReferences to local classes */
106 private static final ReferenceQueue<Class<?>> localDescsQueue =
107 new ReferenceQueue<>();
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67 * serialVersionUID of the class. The ObjectStreamClass for a specific class
68 * loaded in this Java VM can be found/created using the lookup method.
69 *
70 * <p>The algorithm to compute the SerialVersionUID is described in
71 * <a href="{@docRoot}/../specs/serialization/class.html#stream-unique-identifiers">
72 * Object Serialization Specification, Section 4.6, Stream Unique Identifiers</a>.
73 *
74 * @author Mike Warres
75 * @author Roger Riggs
76 * @see ObjectStreamField
77 * @see <a href="{@docRoot}/../specs/serialization/class.html">
78 * Object Serialization Specification, Section 4, Class Descriptors</a>
79 * @since 1.1
80 */
81 public class ObjectStreamClass implements Serializable {
82
83 /** serialPersistentFields value indicating no serializable fields */
84 public static final ObjectStreamField[] NO_FIELDS =
85 new ObjectStreamField[0];
86
87 @java.io.Serial
88 private static final long serialVersionUID = -6120832682080437368L;
89 @java.io.Serial
90 private static final ObjectStreamField[] serialPersistentFields =
91 NO_FIELDS;
92
93 /** reflection factory for obtaining serialization constructors */
94 private static final ReflectionFactory reflFactory =
95 AccessController.doPrivileged(
96 new ReflectionFactory.GetReflectionFactoryAction());
97
98 private static class Caches {
99 /** cache mapping local classes -> descriptors */
100 static final ConcurrentMap<WeakClassKey,Reference<?>> localDescs =
101 new ConcurrentHashMap<>();
102
103 /** cache mapping field group/local desc pairs -> field reflectors */
104 static final ConcurrentMap<FieldReflectorKey,Reference<?>> reflectors =
105 new ConcurrentHashMap<>();
106
107 /** queue for WeakReferences to local classes */
108 private static final ReferenceQueue<Class<?>> localDescsQueue =
109 new ReferenceQueue<>();
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